Nonoxidizing annealing furnace



Aprll l2, 1927. V. E. LANE NoNoxIDIzING ANNEALING FURNACE Filed Feb. l5.1926 2 Sheets-Sheet'z f raising and lowering of-the wor Patented Apr.l2, 1927.

UNITED STATES VICTOR E. LAN, OF DETROIT, MICHIGAN.

NONOXIDIZING ANNEALING FURNACE.

Application filed February 15, 1.926. Serial No. 88,325.

The invent-ion relates to furnaces 0f that type in which the work inintroduced and withdrawn from the heating chamber through a water seal.l

It is the object of the present invention to obtain a construction whichfacilitates rapid transfer of the work through the water seal and alsoone which is comparatively inexpensive to construct and easilymanipulated. With these objects in view the invention consists in theconstruction as hereinafter set forth.

In the drawings;

Figure 1 is a vertical central longitudinal section through my improvedconstruction.

Figure 9. is a cross section on line 2-2 of Figure l.

Figure 3 is a horizontal section on lin 3-3 of Figure 1.

In the installation of furnaces of the type above referred to, one largeitem in the cost is the construction of the pit for forming the waterseal. This is necessarily of sufficient depth to give clearance beneaththe furnace chamber equal to its height together with additional depthfor receiving the elevator mechanism. In addition to the elevatormechanism provision must also be made for the. lateral'transt'er of thework from a. position in registration with the external opening from thepit to a position in registration with the furnace chamber, this beingaccomplished while the elevator is at the bottoni of the pit. With myimprovement the elevator is of such construction as to reduce thenecessary depth of the pit to a minimum and also is provided with meansfor easily and quickly transferring the work laterally thereof.Furthermore the construction is provided with external openings to thepit at opposite sides of the furnace chamber which permits ofintroducing and removing work alternately'from said opposite sides andsimultaneousl with the in registration with the furnace chamber. Thisnot only expedites the introduction and removal of workfrom the furnacebut also balances the load on the elevator as will be hereinafter setforth.

In detail A is the it preferably of rectangular'form and w .ich isprovided with Y an upward. extension B above the floor line C. Theheight of this upward extension is such as to be convenient 4fortransferring the work from a truck to the elevator platform and it alsoserves to decrease the depth below the floor line thereby greatly savingin cost of construction.

D is the furnace of any suitable construction and havingarranged thereinthe retort or muffler. E' in which the work is to be heated. Thisfurnace extends centrally across the pit leaving openings F, F onopposite sides thereof and being supported by any suitable means suchAas the reinforcement bars G imbedded therein near the base thereof. H, Hare lateral extensions of the pit in the central transverse planethereof. I, I are hydraulic jacks located on .opposite sides of thefurnace in registration with said lateral extensions of the pit and J, Jare the piston rods of said jacks extending downward into the pit.

The elevator is formed by a beam K extending horizontally between thepistons J, J uponl which beam is supported the transversely extendingspaced beams L, L. The latter form a track on which is mounted thecarria e M having flanged wheels N, said track eing of a length toextendv from one end of the pit to slightly beyond the centre thereof.riage are elevator platforms O, O so positioned that when one is inregistration with the retort or mutiler E the other will be inregistration with one of the external openings to the pit F, F. P, P arehydraulic cylinders located between the beams L, L and suspended fromthe carriage M. Q, Q are piston rods extending outward from thecylinders P, P and anchored to the opposite end of the beams L, L. Thearrangement is such that the relative movement of the pistons andcylinders P, P will cause the travel of the truck from a position whereone of its platforms is in registration with an external opening to thepit and the other with thse muflier, to a position where the first isplaced in registration with the muiller and the latter' in registrationwith the opposite external opening of the pit. Thismovement occurs onlywhen the beams L, L are at the bottom of the pit and will thus avoidinterference between the work and the furnace.

- To 'take care of the lateral thrust due to the unbalanced condition ofthe loadgwhen the elevator is at one end or the other of thev tracks L,L', anti-friction wheels R are ar'- Upon' opposite ends ofthis car'ranged at opposite ends of the beam K to engage vertically extendingguides S.

lVhat l claim as my invention is:

1. The combination with a mutlie furnace having an opening at thebottom, of av/ater filled pit beneath said furnace extended to provideopenings thereto on opposite sides of the furnace, an elevator Withinsaid pit having a beam extending to the opposite sides thereof, acarriage mounted to travel on said beam and spaced Work supports on saidcarriage for registering with said inutile respectively when saidcarriage is at opposite ends of said beam the wol-l; supports not inregistration with said muliie being regis- -tered with one or the otherof said external openings to the pit.

2. The combination with a muftle furnace having an opening in the bottomthereof, of a water pit beneath said furnace extended to provideentrance openings on opposite sides thereof, an lelevator Within saidpit, spaced Work supports on said elevator for registering with saidmuiie and one 'of the external openings to the pit and means for movingsaid Supports laterally upon said elevator to reverse the registrationthereof.

3. The combination with a mufHe furnace having an opening in the bottomthereof, of a water pit beneath said furnace extended to provideentrance openings on opposite sides thereof, an elevator located in thecentral plane of said furnace and having a beam extended to the oppositesides of the pit, a carriage for travelling on said beam, work supportson said carriage for registering respectively With said Inutile and oneof the external openings to the pit and means for moving said carriageon said beam in the `lowered position of the elevator to reverse theregistration of said work supports.

4. The combination with a mutlle furnace l having an opening at thebottom thereof, of

Maaate a Water pit beneath said furnace extended to provide entranceopenlngs on opposite sides thereof, and also extended to provideopenings in a transverse plane on opposite Y sides of the furnace, anelevator having centrally engaging beams extending respectively in saidtransverse plane, hydraulic jacks on opposite sides of said furnace inone of said transverse planes operatively connected with one of saidbeams, a carriage mounted to travel on the transverse beam and Worksupports on said carriage for siniultaneously registering with saidmuiile and one of the external openings to the pit,

`the registration of said supports being reopening to said mule.

6. The combination with a mulile furnace having an opening at thebottom, of a Water filled pit beneath said furnace extending upwardabove the floor level to a convenient height for receiving Work from atruck, the

rlevel of the Water in said pit being such aS to seal said muflie andsaid pit extending to provide an entrance opening at one side of saidfurnace, an elevator in said pit and means on said elevator fortransferring Work laterally between positions in registrationrespectlvely with said outside opening and said Inutile.

In testimony whereof I affix my signature VICTOR E. LANE.

